'''Wireweed''' may refer to several organisms, including:
* ''Amphibolis'', a genus of marine flowering plants in the family Cymodoceaceae * ''Polygonella'', a genus of flowering plants in the knotweed and smartweed family, Polygonaceae. * ''Rigiopappus leptocladus'', a species of flowering plant in the daisy family, Asteraceae. * ''Sargassum muticum'', also known as the Japanese wireweed, is a large brown seaweed of the genus ''Sargassum''. * ''Sida'' (plant), a genus of flowering herbs and subshrubs in the mallow family, Malvaceae.
{{Plant common name}}